/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.2);
            --border-radius: 12px;
            --border-radius-lg: 20px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            transition: all 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo a {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            white-space: nowrap;
        }

        .logo i {
            font-size: 1.8rem;
            color: var(--accent-cyan);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 0;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-cyan);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-glow);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 10px 20px;
            border-radius: 8px;
            transition: all 0.3s ease;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
        }

        .btn-register {
            font-size: 0.9rem;
            font-weight: 700;
            color: #FFF;
            padding: 10px 24px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--accent-blue), #0033CC);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .btn-register:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            color: var(--accent-cyan);
            background: none;
            border: none;
            cursor: pointer;
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-menu.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-right {
                gap: 8px;
            }
            .btn-login,
            .btn-register {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

        /* Hero Section */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 20px 80px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(8, 9, 15, 0.85) 0%, rgba(13, 17, 30, 0.7) 50%, rgba(8, 9, 15, 0.9) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 750px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-family: var(--font-heading);
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #FFF;
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            font-size: 1rem;
            font-weight: 700;
            color: #000;
            padding: 14px 36px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-cyan), #00BFFF);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.8);
            transform: translateY(-3px);
            color: #000;
        }

        .btn-outline-glow {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-cyan);
            padding: 14px 36px;
            border-radius: 50px;
            background: transparent;
            border: 2px solid var(--accent-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            color: #FFF;
        }

        .hero-countdown {
            margin-top: 28px;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: rgba(0, 0, 0, 0.5);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 12px 24px;
            backdrop-filter: blur(10px);
        }

        .hero-countdown i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
        }

        .countdown-timer {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            display: flex;
            gap: 8px;
        }

        .countdown-timer span {
            background: rgba(0, 240, 255, 0.2);
            padding: 4px 10px;
            border-radius: 6px;
        }

        /* Sections General */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-family: var(--font-heading);
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            color: #FFF;
            margin-bottom: 12px;
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
        }

        /* News Section */
        .news-section {
            background: var(--bg-secondary);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }

        .news-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-list li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding: 14px 0;
        }

        .news-list li:last-child {
            border-bottom: none;
        }

        .news-list a {
            display: flex;
            align-items: baseline;
            gap: 12px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .news-list a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }

        .news-list i {
            font-size: 0.6rem;
            color: var(--accent-cyan);
            margin-top: 6px;
            flex-shrink: 0;
        }

        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-lg);
            padding: 30px;
            backdrop-filter: blur(15px);
            box-shadow: var(--shadow-card);
        }

        .news-sidebar h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-cyan);
        }

        .news-sidebar p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Services Section */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-lg);
            padding: 32px 24px;
            backdrop-filter: blur(15px);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            text-align: left;
        }

        .service-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .service-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.3), rgba(0, 240, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .service-card i {
            font-size: 1.8rem;
            color: var(--accent-cyan);
        }

        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #FFF;
        }

        .service-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* App Section */
        .app-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .app-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .app-content h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            margin-bottom: 16px;
            color: #FFF;
        }

        .app-content p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .app-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .app-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .app-btn.ios {
            background: #000;
            color: #FFF;
            border: 1px solid var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .app-btn.android {
            background: linear-gradient(135deg, var(--accent-blue), #0033CC);
            color: #FFF;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4);
        }

        .app-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.5);
        }

        .app-preview {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-lg);
            padding: 30px;
            backdrop-filter: blur(15px);
            text-align: center;
        }

        .app-preview img {
            border-radius: 16px;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
        }

        @media (max-width: 768px) {
            .app-grid {
                grid-template-columns: 1fr;
            }
            .app-preview {
                margin-top: 30px;
            }
        }

        /* FAQ Section */
        .faq-section {
            background: var(--bg-primary);
        }

        .accordion-faq {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: transparent;
            color: #FFF;
            font-size: 1rem;
            font-weight: 600;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
        }

        .faq-question i {
            color: var(--accent-cyan);
            transition: transform 0.3s ease;
            font-size: 0.9rem;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        /* About Section */
        .about-section {
            background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            color: #FFF;
            margin-bottom: 16px;
        }

        .about-content p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .about-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 20px;
            text-align: center;
        }

        .stat-number {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-cyan);
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .about-image {
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-glow);
        }

        .about-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        @media (max-width: 768px) {
            .about-grid {
                grid-template-columns: 1fr;
            }
            .about-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 40px 0;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 8px 20px;
            border-radius: 50px;
            margin: 16px 0;
            font-size: 0.85rem;
            color: var(--accent-cyan);
        }

        .copyright {
            color: var(--text-muted);
            margin-top: 12px;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.15);
            backdrop-filter: blur(15px);
            border: 2px solid var(--accent-cyan);
            box-shadow: 0 0 25px var(--accent-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: all 0.3s ease;
            animation: fabBreathe 2s ease-in-out infinite;
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.8);
        }

        @keyframes fabBreathe {
            0%, 100% {
                box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            }
            50% {
                box-shadow: 0 0 40px rgba(0, 240, 255, 0.7);
            }
        }

        /* Utility */
        .text-accent {
            color: var(--accent-cyan);
        }

        .mb-0 {
            margin-bottom: 0;
        }

/* roulang page: article */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13, 17, 30, 0.8);
            --card-glass: rgba(13, 17, 30, 0.65);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.35);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 82, 255, 0.25);
            --border-glow: rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.15);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 55%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: var(--transition-fast);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo i {
            font-size: 1.6rem;
            color: var(--accent-cyan);
            -webkit-text-fill-color: initial;
            background: none;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }

        .nav-menu a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-fast);
            position: relative;
            padding: 6px 0;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width var(--transition-smooth);
            border-radius: 2px;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--text-white);
        }

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-white);
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
        }

        .btn-signup {
            background: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            border: none;
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }

        .article-hero {
            background:
                linear-gradient(180deg, rgba(8, 9, 15, 0.7) 0%, rgba(13, 17, 30, 0.85) 100%),
                url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 80px 0 60px;
            position: relative;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60px;
            background: linear-gradient(to top, var(--primary-bg), transparent);
            pointer-events: none;
        }

        .article-hero-content {
            max-width: 720px;
            position: relative;
            z-index: 2;
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(0, 82, 255, 0.2);
            border: 1px solid var(--border-subtle);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 18px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }

        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 5px;
        }

        .article-body-wrapper {
            padding: 50px 0 70px;
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            align-items: flex-start;
        }

        .article-main {
            flex: 1 1 720px;
            max-width: 720px;
        }

        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 30px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
        }

        .article-content {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.75;
        }

        .article-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 36px 0 16px;
            letter-spacing: -0.2px;
        }

        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--text-white);
            margin: 28px 0 12px;
        }

        .article-content p {
            margin: 0 0 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 12px 0 20px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 10px;
            color: var(--text-silver);
        }

        .article-content strong {
            color: var(--text-white);
            font-weight: 600;
        }

        .article-content a {
            color: var(--accent-cyan);
            text-decoration: none;
            border-bottom: 1px dashed var(--accent-cyan);
            transition: var(--transition-fast);
        }

        .article-content a:hover {
            color: #FFFFFF;
            border-bottom-color: #FFFFFF;
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent-blue);
            padding: 16px 22px;
            margin: 24px 0;
            background: var(--card-glass);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-silver);
            font-style: italic;
        }

        .article-sidebar {
            flex: 0 0 300px;
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .sidebar-card {
            background: var(--card-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition-smooth);
        }

        .sidebar-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 0 0 14px;
            letter-spacing: 0.2px;
        }

        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        .sidebar-card ul li:last-child {
            border-bottom: none;
        }

        .sidebar-card ul li i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        .btn-cta-sidebar {
            display: block;
            width: 100%;
            background: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            border: none;
            color: #FFFFFF;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition-fast);
            text-align: center;
            text-decoration: none;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            margin-top: 8px;
        }

        .btn-cta-sidebar:hover {
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .not-found-message {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-muted);
        }

        .not-found-message i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            display: block;
        }

        .not-found-message p {
            font-size: 1.1rem;
            margin-bottom: 24px;
        }

        .btn-back-home {
            display: inline-block;
            background: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            border: none;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
        }

        .btn-back-home:hover {
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 80px;
            z-index: 99;
            width: 52px;
            height: 52px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            transition: var(--transition-smooth);
            animation: float-fab 3s ease-in-out infinite;
            color: var(--accent-cyan);
            font-size: 1.3rem;
        }

        .fab-left:hover {
            opacity: 1;
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.6);
            transform: scale(1.1);
            border-image: linear-gradient(135deg, #FF007F, #00F0FF) 1;
        }

        @keyframes float-fab {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 30px;
            text-align: center;
            color: var(--text-muted);
            position: relative;
            z-index: 1;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .footer-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-badge {
            margin-bottom: 14px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-badge i {
            color: var(--accent-cyan);
            margin: 0 4px;
        }

        .copyright {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        @media (max-width: 1024px) {
            .article-body-wrapper {
                flex-direction: column;
            }
            .article-sidebar {
                flex: 0 0 100%;
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 20px;
            }
            .sidebar-card {
                flex: 1 1 260px;
            }
            .article-hero h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                gap: 12px;
                align-items: stretch;
            }
            .logo {
                justify-content: center;
                font-size: 1.2rem;
            }
            .nav-menu {
                justify-content: center;
                gap: 16px;
                flex-wrap: wrap;
            }
            .nav-actions {
                justify-content: center;
            }
            .nav-menu a {
                font-size: 0.85rem;
            }
            .article-hero {
                padding: 50px 0 40px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-body-wrapper {
                padding: 30px 0 50px;
            }
            .article-sidebar {
                flex-direction: column;
            }
            .fab-left {
                left: 12px;
                bottom: 60px;
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .btn-login,
            .btn-signup {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            .nav-menu {
                gap: 10px;
            }
            .article-hero h1 {
                font-size: 1.45rem;
            }
            .article-content {
                font-size: 0.95rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13,17,30,0.65);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: rgba(0,240,255,0.25);
            --shadow-glow: 0 0 18px rgba(0,240,255,0.45);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --spacing-section: 72px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{
            font-family:'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background:var(--primary-bg);
            color:var(--text-white);
            line-height:1.6;
            overflow-x:hidden;
            -webkit-font-smoothing:antialiased;
            background-image: radial-gradient(circle at 30% 10%, rgba(0,82,255,0.12) 0%, transparent 60%),
                              radial-gradient(circle at 80% 50%, rgba(0,240,255,0.08) 0%, transparent 55%);
        }
        .container{max-width:1240px;margin:0 auto;padding:0 24px}
        img{max-width:100%;height:auto;display:block}
        a{text-decoration:none;color:inherit;transition:color var(--transition-fast)}
        ul,ol{padding-left:1.5rem}
        h1,h2,h3,h4{line-height:1.25;font-weight:700}
        h1{font-size:2.65rem;margin-bottom:0.65rem}
        h2{font-size:2.05rem;margin-bottom:0.8rem}
        h3{font-size:1.55rem;margin-bottom:0.6rem}

        /* Header & Navigation */
        .site-header{
            background:rgba(8,9,15,0.82);
            backdrop-filter:blur(18px);
            -webkit-backdrop-filter:blur(18px);
            border-bottom:1px solid rgba(0,240,255,0.18);
            position:fixed;
            top:0;left:0;width:100%;
            z-index:100;
            transition:background var(--transition-smooth);
        }
        .header-inner{
            display:flex;
            align-items:center;
            justify-content:space-between;
            height:68px;
        }
        .logo{
            font-size:1.55rem;
            font-weight:800;
            letter-spacing:-0.3px;
            background:linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 80%);
            -webkit-background-clip:text;
            -webkit-text-fill-color:transparent;
            background-clip:text;
            white-space:nowrap;
        }
        .nav-menu{display:flex;align-items:center;gap:8px}
        .nav-menu a{
            padding:8px 20px;
            border-radius:24px;
            font-weight:600;
            font-size:0.95rem;
            color:var(--text-silver);
            transition:all var(--transition-fast);
            border:1px solid transparent;
            white-space:nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a.active{
            color:var(--accent-cyan);
            border-color:var(--accent-cyan);
            background:rgba(0,240,255,0.06);
            box-shadow:0 0 10px rgba(0,240,255,0.12);
        }
        .nav-right{display:flex;align-items:center;gap:10px}
        .btn-login{
            padding:9px 22px;border-radius:24px;font-weight:700;
            font-size:0.9rem;background:transparent;color:var(--text-white);
            border:1px solid rgba(255,255,255,0.35);
            transition:all var(--transition-fast);cursor:pointer;white-space:nowrap;
        }
        .btn-login:hover{background:rgba(255,255,255,0.08);border-color:var(--text-white)}
        .btn-signup{
            padding:9px 22px;border-radius:24px;font-weight:700;
            font-size:0.9rem;background:linear-gradient(135deg, var(--accent-blue), #0066ff);
            color:#fff;border:none;cursor:pointer;white-space:nowrap;
            transition:all var(--transition-fast);box-shadow:0 4px 14px rgba(0,82,255,0.5);
        }
        .btn-signup:hover{
            background:linear-gradient(135deg, #0066ff, #0077ff);
            box-shadow:0 6px 22px rgba(0,82,255,0.65);
            transform:translateY(-1px);
        }
        .mobile-toggle{display:none;background:none;border:none;color:var(--text-white);font-size:2rem;cursor:pointer;padding:0 8px}

        /* Hero */
        .hero-category{
            margin-top:68px;
            background:linear-gradient(180deg, #0A0F1A 0%, var(--secondary-bg) 100%);
            position:relative;
            overflow:hidden;
            padding:80px 0 64px;
            border-bottom:1px solid rgba(0,240,255,0.15);
        }
        .hero-category::before{
            content:'';
            position:absolute;
            top:-30%;right:-15%;
            width:500px;height:500px;
            background:radial-gradient(circle, rgba(0,240,255,0.13) 0%, transparent 75%);
            z-index:0;
        }
        .hero-category .container{position:relative;z-index:2}
        .hero-countdown{
            display:inline-flex;align-items:center;gap:12px;
            background:rgba(0,240,255,0.08);border:1px solid var(--border-glow);
            border-radius:50px;padding:8px 24px;margin-bottom:24px;
            font-size:1rem;font-weight:600;color:var(--accent-cyan);
        }
        .countdown-timer{font-family:monospace;font-size:1.25rem;letter-spacing:2px;color:#fff}
        .hero-buttons{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

        /* Step cards */
        .step-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(260px,1fr));gap:28px;margin-top:36px}
        .step-card{
            background:var(--card-bg);
            border:1px solid rgba(255,255,255,0.08);
            border-radius:var(--radius-lg);
            padding:28px 24px;
            backdrop-filter:blur(10px);
            -webkit-backdrop-filter:blur(10px);
            transition:all var(--transition-smooth);
            position:relative;
        }
        .step-card:hover{border-color:var(--border-glow);box-shadow:var(--shadow-glow);transform:translateY(-4px)}
        .step-number{
            font-size:3.2rem;font-weight:900;color:transparent;
            -webkit-text-stroke:1.2px var(--accent-cyan);
            position:absolute;top:12px;right:18px;opacity:0.5;
        }

        /* Screenshot mock area */
        .device-showcase{
            background:rgba(0,0,0,0.35);
            border:1px solid rgba(255,255,255,0.1);
            border-radius:24px;
            padding:20px;
            display:flex;
            align-items:center;
            justify-content:center;
            margin:32px 0;
        }

        /* CTA Panel */
        .cta-glass{
            background:rgba(0,82,255,0.12);
            border:1px solid var(--border-glow);
            border-radius:var(--radius-lg);
            padding:48px 32px;text-align:center;
            backdrop-filter:blur(14px);
            -webkit-backdrop-filter:blur(14px);
            margin-top:var(--spacing-section);
        }

        /* FAQ */
        .faq-item{
            background:var(--card-bg);
            border:1px solid rgba(255,255,255,0.07);
            border-radius:var(--radius-md);
            padding:20px 24px;
            margin-bottom:14px;
            cursor:pointer;
            transition:all var(--transition-fast);
        }
        .faq-item:hover{border-color:var(--border-glow)}
        .faq-question{font-size:1.15rem;font-weight:700;display:flex;justify-content:space-between;align-items:center}
        .faq-answer{margin-top:12px;color:var(--text-silver);display:none;line-height:1.65}
        .faq-item.open .faq-answer{display:block}
        .faq-item.open{box-shadow:0 0 16px rgba(0,240,255,0.1)}

        /* Footer */
        .site-footer{
            background:rgba(8,9,15,0.92);
            border-top:1px solid rgba(0,240,255,0.2);
            padding:48px 0 28px;
            margin-top:var(--spacing-section);
            text-align:center;
        }
        .footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:28px;margin-bottom:20px}
        .footer-links a{color:var(--text-silver);font-weight:600;transition:color var(--transition-fast)}
        .footer-links a:hover{color:var(--accent-cyan)}
        .footer-badge{margin-bottom:14px;color:var(--text-muted);font-size:0.9rem}
        .copyright{color:var(--text-muted);font-size:0.85rem}

        .btn-primary{
            display:inline-block;padding:15px 36px;background:linear-gradient(135deg, var(--accent-blue), #0077ff);
            border:none;border-radius:50px;font-weight:800;font-size:1rem;color:#fff;
            box-shadow:0 6px 20px rgba(0,82,255,0.55);cursor:pointer;
            transition:all var(--transition-fast);text-transform:uppercase;letter-spacing:0.5px;
        }
        .btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(0,82,255,0.7)}
        .btn-outline{
            display:inline-block;padding:14px 34px;border:2px solid var(--accent-cyan);
            border-radius:50px;font-weight:700;font-size:1rem;color:var(--accent-cyan);
            background:rgba(0,240,255,0.05);cursor:pointer;transition:all var(--transition-fast);
        }
        .btn-outline:hover{background:rgba(0,240,255,0.12);box-shadow:0 0 20px rgba(0,240,255,0.35)}

        .text-accent{color:var(--accent-cyan)}
        .section-pad{padding:var(--spacing-section) 0}

        /* Mobile */
        @media(max-width:1024px){
            h1{font-size:2.1rem}
            h2{font-size:1.65rem}
            .header-inner{height:62px}
            .nav-right .btn-login,.nav-right .btn-signup{padding:7px 16px;font-size:0.8rem}
        }
        @media(max-width:768px){
            .mobile-toggle{display:block}
            .nav-menu{
                display:none;flex-direction:column;width:100%;
                position:absolute;top:62px;left:0;
                background:rgba(8,9,15,0.96);backdrop-filter:blur(18px);
                padding:10px 0;border-top:1px solid rgba(255,255,255,0.08);
            }
            .nav-menu.open{display:flex}
            .nav-menu a{margin:4px 20px;width:calc(100% - 40px);text-align:center}
            .hero-category{padding:50px 0 40px}
            .step-grid{grid-template-columns:1fr}
            .cta-glass{padding:32px 18px}
        }
        @media(max-width:520px){
            h1{font-size:1.8rem}
            .hero-category{padding:38px 0 32px}
            .btn-primary,.btn-outline{width:100%;text-align:center}
            .footer-links{gap:18px}
        }

/* roulang page: category2 */
:root {
            --bg-deep: #08090F;
            --bg-card: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --border-glow: rgba(0,240,255,0.3);
            --shadow-neon: 0 0 20px rgba(0,240,255,0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: var(--accent-cyan);
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-blue);
        }

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            outline: none;
            border: none;
            transition: all var(--transition-fast);
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            padding: 0.8rem 0;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            line-height: 1.2;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px var(--accent-cyan));
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .nav-menu a {
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-cyan);
            border-bottom-color: var(--accent-cyan);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.4);
            padding: 0.5rem 1.25rem;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            padding: 0.5rem 1.35rem;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--accent-cyan);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 0.3rem;
        }

        /* Hero */
        .hero {
            padding: 7rem 0 5rem;
            background: radial-gradient(circle at 30% 20%, rgba(0, 82, 255, 0.15) 0%, transparent 60%),
                        radial-gradient(circle at 80% 60%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-silver);
            margin-bottom: 2rem;
            line-height: 1.65;
        }

        .hero-visual {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: 2rem;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-neon);
            backdrop-filter: blur(10px);
        }

        .download-stats {
            display: flex;
            gap: 2rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .stat-item {
            text-align: center;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.6);
            line-height: 1;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-silver);
            margin-top: 0.3rem;
        }

        .device-badges {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .badge-device {
            background: rgba(0, 82, 255, 0.15);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 30px;
            padding: 0.6rem 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--accent-cyan);
        }

        .btn-group-hero {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #fff;
            padding: 0.9rem 2.2rem;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(0, 240, 255, 0.6);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--accent-cyan);
            border: 2px solid var(--accent-cyan);
            padding: 0.85rem 2rem;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }

        /* Sections */
        .section {
            padding: var(--spacing-xl) 0;
        }

        .section-dark {
            background: rgba(13, 17, 30, 0.5);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-white);
        }

        .section-subtitle {
            color: var(--text-silver);
            font-size: 1.05rem;
            margin-bottom: 2.5rem;
            line-height: 1.6;
        }

        .text-left {
            text-align: left;
        }

        .text-gradient {
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* Step Cards */
        .steps-grid {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem;
            border: 1px solid rgba(0, 240, 255, 0.15);
            display: flex;
            gap: 2rem;
            align-items: flex-start;
            transition: border var(--transition-fast);
        }

        .step-card:hover {
            border-color: var(--border-glow);
        }

        .step-number {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            line-height: 1;
            min-width: 70px;
            text-align: center;
        }

        .step-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .step-body p {
            color: var(--text-silver);
            line-height: 1.65;
            margin-bottom: 0.6rem;
        }

        .step-body .note {
            background: rgba(0, 240, 255, 0.08);
            border-left: 3px solid var(--accent-cyan);
            padding: 0.8rem 1rem;
            border-radius: 0 8px 8px 0;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            margin-top: 1rem;
        }

        /* Two Column Image Text */
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .two-col-reverse {
            direction: rtl;
        }

        .two-col-reverse > * {
            direction: ltr;
        }

        .image-frame {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .image-frame img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        /* Feature List */
        .feature-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            color: var(--text-silver);
            line-height: 1.55;
            font-size: 1rem;
        }

        .feature-list li i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            margin-top: 0.15rem;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.12);
            overflow: hidden;
            transition: border var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.35);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 1.2rem 1.5rem;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-question i {
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-silver);
            line-height: 1.6;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.1));
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: center;
            border: 1px solid rgba(0, 240, 255, 0.25);
            backdrop-filter: blur(10px);
        }

        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-block p {
            color: var(--text-silver);
            margin-bottom: 2rem;
            font-size: 1.05rem;
        }

        /* Footer */
        .site-footer {
            background: rgba(13, 17, 30, 0.8);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 2.5rem 0;
            text-align: center;
        }

        .footer-links {
            display: flex;
            gap: 2rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 1.2rem;
        }

        .footer-links a {
            color: var(--text-silver);
            font-weight: 500;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-badge {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            margin-bottom: 1rem;
        }

        .copyright {
            color: #6B7280;
            font-size: 0.8rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            width: 56px;
            height: 56px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(15px);
            border-radius: 30px;
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.6rem;
            cursor: pointer;
            z-index: 999;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: all var(--transition-fast);
            animation: neonPulse 2.5s infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 32px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            opacity: 0.7;
        }

        .fab-left:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            transform: scale(1.1);
            color: #fff;
        }

        @keyframes neonPulse {
            0%, 100% { box-shadow: 0 0 18px rgba(0, 240, 255, 0.45); }
            50% { box-shadow: 0 0 35px rgba(0, 240, 255, 0.75); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .two-col {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(8, 9, 15, 0.95);
                padding: 1rem 0;
                gap: 0.8rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .step-card {
                flex-direction: column;
                gap: 1rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .btn-group-hero {
                flex-direction: column;
                align-items: stretch;
            }
            .download-stats {
                gap: 1rem;
            }
            .stat-number {
                font-size: 1.8rem;
            }
        }